The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 15, 2011
Filed:
Aug. 27, 2008
Timothy Webb, Ann Arbor, MI (US);
Jeffrey B. Schneyer, Farmington Hills, MI (US);
Kevin R. Murphy, Troy, MI (US);
Christopher Oberski, Plymouth, MI (US);
Peter Mitchell Lyon, Birmingham, MI (US);
Timothy Webb, Ann Arbor, MI (US);
Jeffrey B. Schneyer, Farmington Hills, MI (US);
Kevin R. Murphy, Troy, MI (US);
Christopher Oberski, Plymouth, MI (US);
Peter Mitchell Lyon, Birmingham, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A method for operating an internal combustion engine Exhaust Gas Recirculation (EGR) system that includes producing an EGR valve position signal to decrease the amount of exhaust gas passed to the EGR cooler when a processor determines the EGR cooler efficiency is less than the predetermined level and producing an EGR coolant valve position signal to decrease the amount of coolant passed to the EGR cooler when such processor determines the EGR cooler efficiency is less than the predetermined level. The processor produced EGR valve and the EGR coolant valve position signals result in regeneration within the cooler, returning the effectiveness of the cooler to a near 'clean' condition.